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Tips on changing out the Engine Cooling fan clutch

Discussion in '4th Gen 4Runners (2003-2009)' started by Benny123, Aug 3, 2019.

  1. Aug 3, 2019 at 5:11 AM

    Benny123 [OP] Long term owner

    Mar 4, 2019
    Charlotte, NC
    2007 V6 SR5 4WD Galactic Gray Mica
    Im by no means an expert, but Ive changed mine out twice now (read on).
    When I changed out my water pump, thermostat, alt and radiator, I felt it would be appropriate to change out the clutch fan as well. I had read somewhere that a bad clutch fan can weaken a new water pump and allow it to leak earlier. Not to mention that it could allow the vehicle to overheat. My old one had a rusted coil, I did clean it up, but I didnt have alot of faith in it. Clutch is cheap, replacing an engine is not.

    You can test your with the newspaper trick, see below.

    Heres a great video, although on a 3rd gen. Fan is not quite this easy to get out in a 4th gen.

    This is also helpful, see post #8. Remember that we have a 4th gen, this is a 3rd gen thread, so ignore that part 3. You want to order a

    Aisin FCT-072 Engine Cooling Fan Clutch

    So I got a generic one from Amazon. It worked well, drove to FL and back, put 5000 miles on it. Really didnt have any issues, but it was loud. Sound a big like an aircraft in first gear.

    So I ordered an OEM Aisin and it arrived from Amazon. Here is what it should look like if it is OEM. Pics of old OEM fan first. 130000 miles.
    AFTER I cleaned up the rust, yeah, still ugly.


    New fan after blade installed. 65 INCH lbs.



    I should note that the OEM fan weighed 4 more ounces than the knockoff. I suspect there is an issue there, and maybe something that caused it to be out of balance. Weigh your fan.

    I really didnt want to take the whole fan cover off again. Its kindof a bitch and you often have to remove a several clamps & hoses. Its a very tight fit, and you have to get it on this tiny ledge. So I wanted to see if I could change it without doing so. I took some measurements and found you can change the fan without removing the fan cover.

    You will have to remove the top engine cover, and drain enough coolant out from below to empty the top radiator hose. About 2/3 gallon. Give it a few squeezes to move fluid.

    After this, simply remove the top hose. Use vice grips to grab the clamps and slide them. Do not attempt this without the vice grips, extremely frustrating.

    Here is a pic with the hose removed after slight drain. Notice overflow is empty as well.

    Then remove the fan nuts with 12mm wrench. They are snug, but not bad to remove.

    Here is the new fan going in.



    Once back on the studs, torque to 15ft lbs, put the upper hose back on and refill coolant. Verify belt on and water pump pulley is fully seated (it will come forward about 3mm when you take the fan off.)

    Enjoy the quiet OEM fan.
    Last edited: Aug 3, 2019

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